中油海工与塔里木油田等4家单位联合申报的“塔里木超深复杂井水泥环长期密封完整性关键技术研究与工业化应用”项目，获得中国石油和化学工业联合会科技进步奖二等奖，标志着该公司在深井超深井固井领域取得的重大突破获权威机构认可。

The project "Key Technology Research and Industrial Application of Long-Term Sealing Integrity of Cement Liners in Ultra-Deep and Complex Wells in Tarim Oilfield" jointly submitted by China Oil Offshore Engineering and four other units was awarded the Second Prize of the Science and Technology Progress Award by the China Petroleum and Chemical Industry Federation. This indicates that the company's significant breakthroughs in deep and ultra-deep well cementing technology have been recognized by authoritative institutions.

深井超深井的挑战不仅在于打得深、打得成，更在于能否封得住、封得久。经过多年科研攻关，中油海工直面高温、高压等极限工况，在固井领域取得重大突破，其自主研发的3项核心技术——高温大温差固井水泥浆技术、超高温防衰退水泥浆技术、遇烃自愈合水泥浆技术，已实现规模化应用，成为有效攻克固井难题的秘籍，为深地油气资源的安全、高效、长期开发构筑起坚不可摧的地下“长城”。

The challenges of deep and ultra-deep wells lie not only in drilling deep and achieving successful drilling, but also in whether the well can be sealed properly and for a long time. After years of scientific research and efforts, China National Offshore Oil Engineering has directly confronted extreme conditions such as high temperature and high pressure. In the field of well cementing, it has made significant breakthroughs. Its independently developed three core technologies - high-temperature large temperature difference cement slurry technology, ultra-high temperature anti-decay cement slurry technology, and hydrocarbon-contact self-healing cement slurry technology - have been applied on a large scale and have become the secret to effectively solving the problems of well cementing, building an impregnable underground "Great Wall" for the safe, efficient, and long-term development of deep underground oil and gas resources.

秘籍一：高温大温差固井水泥浆技术

Secret Technique 1: High-temperature and Large-Temperature-Difference Cementing Slurry Technology

众所周知，深井超深井固井经常面临一次性封固井段长、井筒上下温差大的严峻挑战，极易导致水泥浆顶部超缓凝，严重威胁井筒完整性和作业安全。针对这一难题，中油海工自主研发的高温大温差固井水泥浆技术破解了超长井段一次封固难题。

It is well known that deep and ultra-deep well cementing often encounters severe challenges such as a long cemented section in one operation and a large temperature difference between the top and bottom of the wellbore, which can easily lead to premature setting of the top of the cement slurry, seriously threatening the integrity of the wellbore and operational safety. To address this problem, the high-temperature and large-temperature-difference cementing slurry technology independently developed by China Oil Offshore Engineering has solved the problem of one-time cementing of ultra-long well sections.

该技术成功突破了现有大温差固井水泥浆普遍仅能适应温差达60至70摄氏度的极限，实现了对100摄氏度以上温差的超强适应能力。

This technology has successfully overcome the existing limitation where the commonly used high-temperature cement slurry can only withstand a temperature difference of 60 to 70 degrees Celsius. It has achieved an extremely strong adaptability to temperature differences above 100 degrees Celsius.

截至目前，该技术已在青海油田、塔里木油田、西南油气田等现场成功应用20余井次，效果显著。在青海油田绿深1井的固井作业中，水泥浆从5200米以深的超高温井底一次上返至地面，成功克服了上下温差高达160摄氏度的极端条件，刷新了国内固井水泥浆一次上返最大温差纪录，为超长井段安全封固提供了可靠的技术方案，有力支撑了深层、超深层油气资源的开发。

Up to now, this technology has been successfully applied in over 20 wells at sites such as Qinghai Oilfield, Tarim Oilfield, and Southwest Oil and Gas Field. The results have been remarkable. During the cementing operation of the Green Shen 1 well in Qinghai Oilfield, the cement slurry was successfully pumped up from a depth of 5,200 meters at the extremely high-temperature bottom of the well to the surface. It successfully overcame the extreme condition of an up-and-down temperature difference of up to 160 degrees Celsius, setting a new record for the maximum temperature difference of cement slurry once being pumped up in China, providing a reliable technical solution for the safe sealing of ultra-long well sections, and effectively supporting the development of deep and ultra-deep oil and gas resources.

秘籍二：超高温防衰退水泥浆技术

Secret Technique 2: Ultra-high Temperature Anti-Depreciation Cement Slurry Technology

常规耐高温水泥石在长期服役中存在强度衰退、水泥环密封性变差的风险，从而导致高压油气上窜，危及后续作业的安全性，大幅缩短油气井寿命。

The conventional high-temperature-resistant cement rock has the risks of strength decline and deterioration of cement ring sealing performance during long-term service, which may lead to the upward migration of high-pressure oil and gas, endangering the safety of subsequent operations and significantly shortening the lifespan of the oil and gas well.

为攻克这一难题，中油海工组织专家团队探明了超高温环境下水泥石强度衰退机理，创新性运用晶相控制技术，成功研发出新型高温防衰退核心材料，并形成超高温防衰退水泥浆技术。该技术能稳定水泥石在超高温环境下的水化产物的晶相结构，确保水泥石强度在200至240摄氏度的极端温度下长期保持稳定，有效保障井筒的密封完整性，赋予井筒“长寿命”。

To solve this problem, the experts from China Oil Offshore Engineering organized an expert team to investigate the mechanism of cement stone strength decline under extremely high temperatures. They innovatively applied the crystal phase control technology and successfully developed a new type of core material for high-temperature prevention of strength decline. They also formed the technology of ultra-high-temperature prevention of strength decline cement slurry. This technology can stabilize the crystal phase structure of the hydration products of the cement stone in the ultra-high temperature environment, ensuring that the strength of the cement stone remains stable for a long time at extreme temperatures ranging from 200 to 240 degrees Celsius. It effectively guarantees the sealing integrity of the wellbore and endows the wellbore with "longevity".

目前，该技术已在辽河油田、中国石化青海干热岩等现场应用10余井次，效果良好。其中，辽河油田MT1井井深5877米，井底温度200摄氏度，刷新油田井深与温度双项纪录；中国石化干热岩GR1井井底温度236摄氏度，创国内干热岩固井温度最高纪录。现场应用结果表明，该技术能满足超高温环境下的工况要求，为深井超深井的“长寿”运行奠定了坚实基础。

Currently, this technology has been applied in over 10 wells at sites such as Liaohe Oilfield and China Petrochemical Qinghai Geothermal Reservoir. The results have been excellent. Among them, the MT1 well in Liaohe Oilfield has a well depth of 5877 meters and a bottom temperature of 200 degrees Celsius, setting new records for both well depth and bottom temperature in the oilfield; the GR1 well in China Petrochemical's geothermal reservoir has a bottom temperature of 236 degrees Celsius, setting the highest temperature record for geothermal well cementing in China. The on-site application results show that this technology can meet the working conditions in extremely high-temperature environments, laying a solid foundation for the "longevity" operation of deep and ultra-deep wells.

秘籍三：遇烃自愈合水泥浆技术

Secret Tip 3: Self-healing cement slurry technology for hydrocarbons

固井水泥环在温度压力等作用下，极易产生微裂缝或微环隙，形成油气窜流通道，严重时引发环空异常带压甚至井喷风险，这已成为固井领域制约高压油气井安全高效开发的关键技术瓶颈。中油海工经过多轮科研攻关，自主研发出遇烃自愈合水泥浆技术，可“主动修复”油气泄漏通道，解决高压工况下固井水泥环密封失效问题，实现国内首创。

Under the influence of temperature, pressure and other factors, the cement ring of well cementing is prone to develop micro-cracks or micro-gaps, forming channels for oil and gas to migrate. In severe cases, it may lead to abnormal pressure in the annulus or even a risk of blowout. This has become a key technical bottleneck restricting the safe and efficient development of high-pressure oil and gas wells in the field of well cementing. After multiple rounds of scientific research, China National Offshore Oil Engineering has independently developed the self-healing cement slurry technology for encountering hydrocarbons, which can "actively repair" the leakage channels of oil and gas and solve the problem of sealing failure of the cement ring in well cementing under high-pressure conditions, achieving a domestic first.

该技术的核心在于研发出了一种智能烃敏材料，流经的油气会触发该材料发生反应，自动“感知”并高效修复微裂缝通道，恢复密封屏障，如同为水泥环嵌入了“智能感知修复芯片”，实现了从“被动防御”向“主动修复”的革命性跨越。实验表明，该技术渗透率恢复率超过85％，裂缝愈合宽度可达40微米，显著提升了固井一次成功率和井筒长期密封完整性，被誉为固井水泥环的“智能护身符”。

The core of this technology lies in the development of an intelligent hydrocarbon-sensitive material. The flowing oil and gas will trigger a reaction in this material, automatically "perceiving" and efficiently repairing micro-crack channels, restoring the sealing barrier, just like embedding an "intelligent sensing repair chip" into the cement ring. This has achieved a revolutionary leap from "passive defense" to "active repair". Experimental results show that the permeability recovery rate of this technology exceeds 85%, and the healing width of the cracks can reach 40 micrometers. This significantly improves the success rate of cementing operations and the long-term sealing integrity of the wellbore, and is hailed as the "intelligent amulet" of the cement ring for well cementing.

目前，遇烃自愈合水泥浆技术已实现规模化应用，可有效减少传统修井作业，挽回停产损失和修井费超千万元。该技术的核心理念“一次固井，终身受益”，正引领固井技术迈入智能化、长效化的新阶段，为深地复杂油气藏的长期安全稳定生产树立了新的技术标杆。

At present, the hydrocarbon self-healing cement slurry technology has achieved large-scale application, effectively reducing traditional well repair operations and recovering losses from production halts and exceeding one million yuan in well repair costs. The core concept of this technology, "one-time cementing, lifelong benefits", is leading the cementing technology into a new stage of intelligence and long-term effectiveness, setting a new technical benchmark for the long-term safe and stable production of deep and complex oil and gas reservoirs.